CN115154165B - Leg supporting device for operation - Google Patents
Leg supporting device for operation Download PDFInfo
- Publication number
- CN115154165B CN115154165B CN202210921273.4A CN202210921273A CN115154165B CN 115154165 B CN115154165 B CN 115154165B CN 202210921273 A CN202210921273 A CN 202210921273A CN 115154165 B CN115154165 B CN 115154165B
- Authority
- CN
- China
- Prior art keywords
- sliding block
- sliding
- bottom plate
- supporting part
- locking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 210000001698 popliteal fossa Anatomy 0.000 claims abstract description 20
- 210000002414 leg Anatomy 0.000 claims abstract description 12
- 238000001356 surgical procedure Methods 0.000 claims description 9
- 210000003141 lower extremity Anatomy 0.000 abstract description 5
- 210000000629 knee joint Anatomy 0.000 description 9
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000013150 knee replacement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G13/00—Operating tables; Auxiliary appliances therefor
- A61G13/10—Parts, details or accessories
- A61G13/12—Rests specially adapted therefor; Arrangements of patient-supporting surfaces
- A61G13/1205—Rests specially adapted therefor; Arrangements of patient-supporting surfaces for specific parts of the body
- A61G13/1245—Knees, upper or lower legs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G13/00—Operating tables; Auxiliary appliances therefor
- A61G13/10—Parts, details or accessories
- A61G13/12—Rests specially adapted therefor; Arrangements of patient-supporting surfaces
- A61G13/1205—Rests specially adapted therefor; Arrangements of patient-supporting surfaces for specific parts of the body
- A61G13/125—Ankles or feet
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G13/00—Operating tables; Auxiliary appliances therefor
- A61G13/10—Parts, details or accessories
- A61G13/12—Rests specially adapted therefor; Arrangements of patient-supporting surfaces
- A61G13/128—Rests specially adapted therefor; Arrangements of patient-supporting surfaces with mechanical surface adaptations
- A61G13/1285—Rests specially adapted therefor; Arrangements of patient-supporting surfaces with mechanical surface adaptations having modular surface parts, e.g. being replaceable or turnable
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
- A61B2017/0287—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors with elastic retracting members connectable to a frame, e.g. hooked elastic wires
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
The invention discloses a leg supporting device for operation, which comprises a bottom plate, wherein a bottom plate fixing mechanism for fixing an operation table is arranged on the bottom plate, a sliding rail is arranged on the bottom plate, a first sliding block and a second sliding block are arranged on the sliding rail in a sliding way, a sole supporting part capable of universally rotating and a first locking bolt for locking the first sliding block on the sliding rail are arranged on the first sliding block, a lifting supporting rod with adjustable supporting height and a second locking bolt for locking the second sliding block on the sliding rail are arranged on the second sliding block, a popliteal fossa supporting part is arranged at the free end of the lifting supporting rod, two elastic ropes are connected on the popliteal fossa supporting part, and draw hooks for pulling skin are respectively connected on the two elastic ropes. The positions of the sole supporting part and the popliteal fossa supporting part on the bottom plate of the invention can be adjusted according to the needs so as to adapt to the lower limbs of patients with different lengths, and the two draw hooks can be used for pushing out the skin at the operation position by using the elastic ropes connected to the popliteal fossa supporting part without additional manual assistance so as to facilitate the operation.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a leg supporting device for surgery.
Background
To current shank fixing tool, during clinical use, unable totally fix patient's shank, need additionally beat a fixed needle on patient's bone for fixed patient's shank, and in traditional knee joint operation, still need other people to cooperate, the manpower is with the drag hook with the operation position take off, leads to the shank fixing tool's that current knee joint was used use convenience not good. A device for fixing legs in knee replacement surgery as disclosed in the prior art CN209629853U can support and fix legs, but cannot fix sole parts well, and as described above, additional manpower is required to assist in pulling open the surgical site for surgery.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a leg supporting device for operation, wherein the front and back positions and the inclination angles of sole supporting parts on a bottom plate, the front and back positions and the supporting heights of popliteal supporting parts can be adjusted according to the needs so as to adapt to the lower limbs of patients with different lengths, and the skin at the knee joint operation position of the patient can be pulled away by using two draw hooks without additional manpower assistance by using elastic ropes connected to the popliteal supporting parts, so that the operation is convenient.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
The utility model provides a shank strutting arrangement that operation was used, including the bottom plate, be provided with the bottom plate fixed establishment who is used for carrying out the fixed with the operation table on the bottom plate, be equipped with a slide rail on the bottom plate, slide rail upper slide is equipped with first slider and second slider, be provided with on the first slider but universal pivoted sole supporting part and be used for locking first slider on the slide rail first locking bolt, be provided with on the second slider and support highly adjustable lift bracing piece and be used for locking the second slider on the slide rail second locking bolt, the popliteal fossa supporting part is gone up to the free end of lift bracing piece, be connected with two elastic ropes on the popliteal fossa supporting part, be connected with a drag hook that is used for pulling open skin usefulness on two elastic ropes respectively.
Further, the popliteal fossa supporting part is a cross rod structure horizontally arranged on the free end of the lifting supporting rod.
Further, two binding grooves which are oppositely arranged left and right and/or two binding hooks which are oppositely arranged left and right are arranged on the popliteal fossa supporting part.
Further, a ball head is arranged at the bottom of the sole supporting part, an embedding hole with adjustable tightness is formed in the first sliding block, the sole supporting part is movably connected to the first sliding block in an angle-adjustable manner through the cooperation of the ball head and the embedding hole, and an elastic bolt for adjusting the tightness degree of the embedding hole is connected to the first sliding block.
Further, the elastic rope is a rubber band.
Further, the lower extreme adaptation grafting of lift bracing piece is on the second slider, and is provided with the third locking bolt that is used for locking the lift bracing piece lower extreme on the second slider.
Further, the bottom plate fixed establishment includes the connecting rod and with the slip fixture block of the side guide rail looks adaptation on the operating table side, but the upper end of connecting rod swing joint on the bottom plate through a fourth locking bolt angle-adjusting, the lower extreme activity of connecting rod inserts with the liftable and establishes on the slip fixture block, and is provided with the fifth locking bolt that is used for locking connecting rod and slip fixture block together on the slip fixture block.
The technical scheme has the following advantages or beneficial effects:
In the leg supporting device for the operation, the bottom plate can be fixed on an operation table through the bottom plate fixing mechanism on the bottom plate for use, the first sliding block and the second sliding block which are arranged front and back are arranged on the sliding rail of the bottom plate, the sole supporting part for supporting the sole of a human body and the popliteal fossa supporting part for supporting the popliteal fossa position on the back of the knee joint are respectively connected to the first sliding block and the second sliding block, so that the front and back distance between the sole supporting part and the popliteal fossa supporting part can be adaptively adjusted according to the requirements, meanwhile, the sole supporting part is configured to be connected to the first sliding block in a universal rotation mode, and the popliteal fossa supporting part is configured to be connected to the second sliding block in a height-adjustable mode through the lifting supporting rods which can be telescopically adjusted, and therefore, the front and back positions, the inclination angles and the front and back positions of the popliteal fossa supporting parts on the bottom plate can be adjusted according to the requirements, and further adapt to lower limbs of patients with different lengths. In addition, two elastic ropes are connected to the popliteal fossa supporting portion, and a draw hook for pulling the skin is connected to the two elastic ropes respectively, so that in knee joint operation, the two draw hooks can be used for pulling the skin at the knee joint operation position of a patient away by using the two elastic ropes, extra manpower is not needed, operation is convenient to conduct and operate, and use is more convenient.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of the present invention.
FIG. 2 is a schematic diagram of the usage status of an embodiment of the present invention.
Fig. 3 is a cross-sectional view of the structure of an embodiment of the present invention.
Fig. 4 is a structural cross-sectional view of a second embodiment of the present invention.
Fig. 5 is a structural cross-sectional view III of an embodiment of the present invention.
Description of the reference numerals:
1. The sole plate comprises a bottom plate, 2, a sliding rail, 3, a first sliding block, 4, a second sliding block, 5, a sole supporting part, 6, a lifting supporting rod, 7, a popliteal supporting part, 8, an elastic rope, 9, a drag hook, 11, a bottom plate fixing mechanism, 31, a first locking bolt, 32, a embedding hole, 33, a tightening bolt, 41, a second locking bolt, 42, a third locking bolt, 51, a ball head, 71, a binding groove, 72, a binding hook, 111, a connecting rod, 112, a sliding clamping block, 113, a fourth locking bolt, 114 and a fifth locking bolt.
Detailed Description
The invention is further described below with reference to the drawings and examples.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1 to 5, an embodiment of the present invention provides a leg supporting device for surgery, which includes a base plate 1, a base plate fixing mechanism 11 for fixing with a surgery bed is provided on the base plate 1, a sliding rail 2 is provided on the base plate 1, a first sliding block 3 and a second sliding block 4 are slidingly provided on the sliding rail 2, a sole supporting portion 5 capable of universally rotating and a first locking bolt 31 for locking the first sliding block 3 on the sliding rail 2 are provided on the first sliding block 3, a lifting supporting rod 6 with adjustable supporting height and a second locking bolt 41 for locking the second sliding block 4 on the sliding rail 2 are provided on the second sliding block 4, a popliteal fossa supporting portion 7 is provided on a free end of the lifting supporting rod 6, two elastic ropes 8 are connected on the popliteal fossa supporting portion 7, and a drag hook 9 for pulling skin is connected on the two elastic ropes 8 respectively. It can be understood that in this embodiment, the base plate 1 can be fixed to an operating table by the base plate fixing mechanism 11 thereon, the first slider 3 and the second slider 4 arranged front and back are provided on the slide rail 2 of the base plate 1, the sole support 5 for supporting the sole of the human body and the popliteal support 7 for supporting the popliteal portion on the back of the knee joint are respectively connected to the first slider 3 and the second slider 4, so that the front-back distance therebetween can be adaptively adjusted as required, meanwhile, the sole support 5 is configured to be connected to the first slider 3 in a universal rotation manner, and the popliteal support 7 is configured to be connected to the second slider 4 in a height-adjustable manner by the lifting support rod 6 which can be telescopically adjusted, so that the front-back position, the inclination angle, the front-back position and the support height of the sole support on the base plate can be adjusted as required, thereby adapting to the lower limbs of patients with different lengths. In addition, two elastic ropes 8 are connected to the popliteal fossa supporting portion 7, and draw hooks 9 for pulling the skin are connected to the two elastic ropes 8 respectively, so that in knee joint operation, the two draw hooks 9 can be used for pushing the skin of a patient at the knee joint operation position by using the two elastic ropes 8, extra manpower is not needed, operation is convenient, and the use is more convenient.
Referring to fig. 1 and 2, in a preferred embodiment, the popliteal fossa supporting portion 7 is a cross bar structure horizontally disposed on the free end of the lifting support bar 6. In this embodiment, preferably, two binding grooves 71 and/or two binding hooks 72 are arranged on the popliteal support portion 7, wherein the two binding grooves are arranged oppositely left and right. It will be appreciated that in this embodiment, the elastic cord 8 may be bound to the corresponding binding groove 71 or the binding hook 72 as required, however, those skilled in the art will appreciate that in other embodiments, other positioning structures for binding the elastic cord 8 may be provided on the popliteal support 7, and the present invention is not limited to the specific embodiment disclosed in this embodiment, as long as the elastic cord 8 can be fixed.
Referring to fig. 2,3 and 5, in a preferred embodiment, a ball head 51 is disposed at the bottom of the sole support portion 5, an adjustable insertion hole 32 is formed in the first slider 3, the sole support portion 5 is movably connected to the first slider 3 through the cooperation of the ball head 51 and the insertion hole 32 in an angle-adjustable manner, and an elastic bolt 33 for adjusting the tightness of the insertion hole 32 is connected to the first slider 3. By means of the design, the inclination angle of the sole support part 5 on the first sliding block 3 is adjusted according to the requirement, and the front and rear positions of the first sliding block 3 and the second sliding block 4 are adjusted in a matched mode, so that the fixing requirements of lower limbs of patients with different lengths can be well met, and the universal adaptability of the sole support part is greatly improved.
Referring to fig. 2, in a preferred embodiment, the elastic cord 8 is a rubber band. However, those skilled in the art will appreciate that in other embodiments, the bungee cord 8 may be other elongated bungee structures, such as bungee cords, etc., and are not limited to the specific implementations disclosed in this embodiment.
Referring to fig. 1, 2 and 4, in a preferred embodiment, the lower end of the lifting support rod 6 is adapted to be inserted into the second slider 4, and a third locking bolt 42 for locking the lower end of the lifting support rod 6 to the second slider 4 is provided on the second slider 4.
Referring to fig. 1 and 2, in a preferred embodiment, the bottom plate fixing mechanism 11 includes a connecting rod 111 and a sliding clamping block 112 adapted to a side rail on a side of the operating table, the upper end of the connecting rod 111 is movably connected to the bottom plate 1 through a fourth locking bolt 113 in an angle-adjustable manner, the lower end of the connecting rod 111 is movably inserted into the sliding clamping block 112 in a lifting manner, and a fifth locking bolt 114 for locking the connecting rod 111 and the sliding clamping block 112 is disposed on the sliding clamping block 112. It will be appreciated that the connection angle of the connection rod 111 to the base plate 1 can be adjusted by tightening the fourth locking bolt 113 so that the base plate 1 can be better fixed to the bed plate of the operating table, and the elevation height position of the connection rod 111 can be adjusted by tightening the fifth locking bolt 114 so as to be adapted to the side rail of the non-height position.
The embodiments are merely illustrative of the technical solution of the present invention, and not limiting thereof; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and therefore all other embodiments obtained by those skilled in the art without making creative efforts are intended to fall within the protection scope of the present invention.
Claims (4)
1. A leg support device for surgery, characterized in that: the device comprises a bottom plate (1), wherein a bottom plate fixing mechanism (11) for fixing an operating table is arranged on the bottom plate (1), a sliding rail (2) is arranged on the bottom plate (1), a first sliding block (3) and a second sliding block (4) are arranged on the sliding rail (2) in a sliding way, a sole supporting part (5) capable of universally rotating and a first locking bolt (31) for locking the first sliding block (3) on the sliding rail (2) are arranged on the first sliding block (3), a lifting supporting rod (6) with adjustable supporting height and a second locking bolt (41) for locking the second sliding block (4) on the sliding rail (2) are arranged on the second sliding block (4), two elastic ropes (8) are connected to the popliteal fossa supporting part (7) at the free end of the lifting supporting rod (6), and a draw hook (9) for pulling skin is connected to the two elastic ropes (8) respectively;
The popliteal support part (7) is a cross bar structure horizontally arranged at the free end of the lifting support rod (6);
two binding grooves (71) which are oppositely arranged left and right and/or two binding hooks (72) which are oppositely arranged left and right are arranged on the popliteal fossa supporting part (7);
The bottom of sole supporting part (5) is provided with a bulb (51), has seted up a elasticity adjustable embedding hole (32) on first slider (3), and sole supporting part (5) are through bulb (51) and embedding hole (32) cooperation adjustable angle ground swing joint on first slider (3), and are connected with an elasticity bolt (33) that are used for adjusting embedding hole (32) elasticity degree on first slider (3).
2. A leg support device for surgery as claimed in claim 1, wherein: the elastic rope (8) is a rubber band.
3. A leg support device for surgery as claimed in claim 1, wherein: the lower end of the lifting support rod (6) is inserted and connected to the second sliding block (4) in an adapting mode, and a third locking bolt (42) used for locking the lower end of the lifting support rod (6) on the second sliding block (4) is arranged on the second sliding block (4).
4. A leg support device for surgery according to any one of claims 1 to 3, wherein: the bottom plate fixing mechanism (11) comprises a connecting rod (111) and a sliding clamping block (112) matched with a side guide rail on the side edge of the operating table, the upper end of the connecting rod (111) is movably connected to the bottom plate (1) in an angle-adjustable manner through a fourth locking bolt (113), the lower end of the connecting rod (111) is movably inserted on the sliding clamping block (112) in a lifting manner, and a fifth locking bolt (114) used for locking the connecting rod (111) and the sliding clamping block (112) together is arranged on the sliding clamping block (112).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210921273.4A CN115154165B (en) | 2022-08-02 | 2022-08-02 | Leg supporting device for operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210921273.4A CN115154165B (en) | 2022-08-02 | 2022-08-02 | Leg supporting device for operation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115154165A CN115154165A (en) | 2022-10-11 |
| CN115154165B true CN115154165B (en) | 2024-05-10 |
Family
ID=83477553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210921273.4A Active CN115154165B (en) | 2022-08-02 | 2022-08-02 | Leg supporting device for operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115154165B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201235050Y (en) * | 2008-07-31 | 2009-05-13 | 吴英昌 | Bone surgery bed |
| CN203042340U (en) * | 2013-02-05 | 2013-07-10 | 华春梅 | Surgical retractor for gynaecology and obstetrics |
| CN109330813A (en) * | 2018-12-11 | 2019-02-15 | 北京和华瑞博科技有限公司 | A kind of device and its application method for Convenient table in replacement knee in arthroplasty |
| CN208926465U (en) * | 2018-05-25 | 2019-06-04 | 深圳市宝安区沙井人民医院 | A kind of surgery operation drag hook |
| CN110101535A (en) * | 2019-04-28 | 2019-08-09 | 汕头大学医学院第一附属医院 | The obstetric table of lithotomy position complication can be reduced |
| CN110339011A (en) * | 2019-07-12 | 2019-10-18 | 杭州市萧山区中医院 | Indirect labor's knee prosthesis adjustable fixer |
| CN215227977U (en) * | 2021-05-18 | 2021-12-21 | 河南科技大学 | Portable adjustable medical combined drag hook |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070102008A1 (en) * | 2005-11-04 | 2007-05-10 | The LeVahn Intellectual Property Holding Company, LLC | Table mounted thigh harness |
| US11395680B2 (en) * | 2019-09-04 | 2022-07-26 | The Third Hospital Of Hebei Medical University | Lower limb traction device for intramedullary nail implantation operation |
-
2022
- 2022-08-02 CN CN202210921273.4A patent/CN115154165B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201235050Y (en) * | 2008-07-31 | 2009-05-13 | 吴英昌 | Bone surgery bed |
| CN203042340U (en) * | 2013-02-05 | 2013-07-10 | 华春梅 | Surgical retractor for gynaecology and obstetrics |
| CN208926465U (en) * | 2018-05-25 | 2019-06-04 | 深圳市宝安区沙井人民医院 | A kind of surgery operation drag hook |
| CN109330813A (en) * | 2018-12-11 | 2019-02-15 | 北京和华瑞博科技有限公司 | A kind of device and its application method for Convenient table in replacement knee in arthroplasty |
| CN110101535A (en) * | 2019-04-28 | 2019-08-09 | 汕头大学医学院第一附属医院 | The obstetric table of lithotomy position complication can be reduced |
| CN110339011A (en) * | 2019-07-12 | 2019-10-18 | 杭州市萧山区中医院 | Indirect labor's knee prosthesis adjustable fixer |
| CN215227977U (en) * | 2021-05-18 | 2021-12-21 | 河南科技大学 | Portable adjustable medical combined drag hook |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115154165A (en) | 2022-10-11 |
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Inventor after: Zhang Xiaofeng Inventor after: Zeng Da Inventor after: Li Junfeng Inventor after: Lin Yun Inventor after: Guo Shaobo Inventor after: Liu Jiaqi Inventor before: Zhang Xiaofeng Inventor before: Zeng Da Inventor before: Lin Yun Inventor before: Guo Shaobo Inventor before: Liu Jiaqi |
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